main/linux-postmarketos-stericsson: upgrade to 5.8, fix samsung-skomer
Accidentally we did not test the device package correctly, so samsung-skomer
was actually broken the whole time :D I added a commit to fix it. Fixes #705 (closed)
Also update mainline kernel fork to fix some more issues:
- Update to Linux 5.8
- samsung-skomer:
- Fix accelerometer mount-matrix (by Linus Walleij)
- Fix some potential display issue(s) (by Linus Walleij)
- Enable touchscreen driver in kernel config
Cc: @Newbyte